644501314 has 16 divisors (see below), whose sum is σ = 1029348000. Its totient is φ = 301597504.

The previous prime is 644501311. The next prime is 644501317. The reversal of 644501314 is 413105446.

It is an interprime number because it is at equal distance from previous prime (644501311) and next prime (644501317).

It is not an unprimeable number, because it can be changed into a prime (644501311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46864 + ... + 59035.

It is an arithmetic number, because the mean of its divisors is an integer number (64334250).

Almost surely, 2^644501314 is an apocalyptic number.

644501314 is a deficient number, since it is larger than the sum of its proper divisors (384846686).

644501314 is a wasteful number, since it uses less digits than its factorization.

644501314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106097.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 644501314 is about 25387.0304289415. The cubic root of 644501314 is about 863.7895301024.

The spelling of 644501314 in words is "six hundred forty-four million, five hundred one thousand, three hundred fourteen".